摘要
锂渣作为工业生产中的副产品,经过加工后可作为矿物掺合料加入水泥中,进而改善混凝土性能。本文设计不同水胶比和锂渣掺量的混凝土,对其施加极限强度的4个标准压应力(0%、10%、30%、50%),通过对混凝土的电通量值进行测定,分析不同因素对混凝土氯离子渗透性能的影响。结果表明:锂渣能有效提高混凝土抗氯离子渗透性能,且随着锂渣掺量的增多,混凝土抗氯离子渗透性显著增强;当锂渣掺量为20%时,混凝土的28 d抗氯离子渗透性能最好,当锂渣掺量为30%时,混凝土的抗氯离子渗透性降低。对混凝土施加压荷载时,存在一个确定的应力值,在此应力值之前,混凝土的氯离子渗透性变化不明显,达到该值后,氯离子渗透性有明显增强,水胶比为0.62和0.45时,压力阈值为0.5 f,水胶比为0.40时,压力阈值为0.3 f。
Lithium slag,as a by-product in industrial production,can be processed and added as a mineral admixture to cement,thereby improving the performance of concrete.This paper designs concrete with different water cement ratios and lithium slag content,and applies four standard compressive stresses(0%,10%,30%,50%)to its ultimate strength,analyzes the influence of different factors on the chloride ion permeability performance of the concrete by measuring the electrical flux value of the concrete.The results show that lithium slag can effectively improve the chloride ion penetration resistance of concrete,and with the increase of lithium slag content,the chloride ion penetration resistance of concrete is significantly enhanced;when the lithium slag content is 20%,the 28 days chloride ion penetration resistance of concrete is the best;when the lithium slag content is 30%,the resistance of concrete to chloride ion penetration decreases.When applying compressive load to concrete,there exists a certain stress value.Before this stress value,the chloride ion permeability of concrete does not change significantly.After reaching this value,its chloride ion permeability is significantly enhanced.When the water cement ratio is 0.62 and 0.45,the pressure threshold is 0.5 f;when the water cement ratio is 0.40,the pressure threshold is 0.3 f.
出处
《混凝土世界》
2025年第2期23-29,共7页
China Concrete
基金
2024年新疆维吾尔自治区大学生创业项目(S202410763012)
喀什大学校级课题((2024)2930,(2024)2926)。
关键词
压应力
锂渣掺量
水胶比
电通量
龄期
混凝土
Compressive stress
lithium slag content
water cement ratio
electric flux
age
concrete
